Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e47efdaa53d58c…

MALICIOUS

PDF

80.0 KB Created: 2021-09-05 21:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e075763e58c6a6cf7927724aebb5e8ac SHA-1: ede01c919c5e86dfcafd9fc226709d146867e36d SHA-256: c0e47efdaa53d58c3ef74e3685db0d255c81dc89c855a014c25399270f0e8f2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to compromised websites, including WordPress upload directories and disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using such sites to obscure the true destination, likely for phishing or malware distribution. No scripts were extracted, but the presence of multiple compromised links suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a31ab00f605---41024439436.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072981fdd2cf---72293996519.pdfIn PDF document text
    • http://www.sosonomo.com/ckfinder/userfiles/files/55199499113.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/vazagorugi.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/muzifoxige.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/60019002500.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/36527681688.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104c44e93836---77722165499.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/rirelalibo.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4472838cc7---11103469423.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/fqa9m87g7q3aqjhmhhbq2nbodm/55030722803.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/49263439913.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/jufatezibufisojowinoru.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/likexobinexixexaxupexi.pdfIn PDF document text
    • http://asustainable.com/global/file/wedizifoxuxisemi.pdfIn PDF document text
    • http://rexant.by/upload/editor/files/bifaxomobebeg.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/mikebim.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/roxegusufa.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/nofazevifebebeg.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios//files/53757663559.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///2021714937141.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/64435091509.pdfIn PDF document text
    • https://orrizon.ru/images/file/bifozujamodew.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/22211846160.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/nejosezeregerolareja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=benzoic+acid+sds+pdfPDF link annotation
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/lupekemokokirumuvedapuzo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D3 17288 bytes
SHA-256: b5c70d6e506d68b1ea179e15fff0e0ed2945bd31b33f06fe230e19c2a7482cd8
font_01_sfnt_off00010261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10261 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A78 10484 bytes
SHA-256: 86ef3d79e7b46a9d25ffec8b3ca63911541d93b65dd2dc6c12d62d815e1802f0

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